what about allowing us add some searchParams to callbackUrl?

[LiuN1an]

Description 📓

We don't use email action flow first and allow users to write their username before oauth (we can promise that username is not duplicate in this step). I wanna to push the username to the callbackurl in the redirect_uri sent to oauth's authorize end point. But why it will be limited to use 'url.origin' to callbackUrl and can not be customizable.

How to reproduce ☕️

Contributing 🙌🏽

Yes, I am willing to help implement this feature in a PR